Ping Plotter *doesn't* do IP address scanning like this. To be honest, I'm not entirely sure how tracing to sequential IP addresses would add a lot of value - as the route will likely be the same to each of these sequential IP addresses. If you're using it for alerting, then I can see some utility here - but I'd love to hear how you're thinking of using this feature (I just don't see the utility).
As you might expect from my confused look, Ping Plotter isn't going to do this for you out of the box today.